Derlet, P. M.Lewis, L. J.Meyer, R.Stuhr, U.Van Swygenhoven, H.2004-12-032004-12-0320012001http://hdl.handle.net/2003/159810.17877/DE290R-11381enThe American Physical SocietyPhysical Review Letters530Low-Frequency Vibrational Properties of Nanocrystalline Materials10.1103/PhysRevLett.87.205501article (journal)